Design and Performance Analysis of a Coal Bed Gas Drainage Machine Based on Incomplete Non-Circular Gears

Abstract

Abstract:In order to solve the problem of reciprocating motion in no beam supported mining machines, putting energy saving as a starting point in Coal Bed Methane (CBM) exploitation, this paper designs a completely non-circular gear automatic reversing vertical drainage machine based on the theory of non-circular gear transmission. In the field of CBM exploitation, the use of non-circular gears is an attempt at an innovation. First of all, according to the working conditions of the pump and use requirements, a scheme is established whereby the one-way rotary motion of the motor is changed into reciprocating motion so that it could drive the oil pumping rod to achieve the upper and lower mining. Secondly, this paper has designed a new type non-circular gear reversing box as the core component to replace the traditional four beam linkage mechanism and also provides elaborate calculations. Finally, the movement simulation of the non-circular gear reversing gear system is completed. Comparing the motion simulation results with the theoretical ones, the correctness of our theoretical analysis can be verified. Compared with the traditional devices, the new coal seam gas drainage machine model design has nearly 11% higher efficiency, which has obvious energy saving effects and reduces the cost of mining coal seam gas.

A prediction of Cutting Force, System Vibration, and Productivity in Five-Axis Milling Process of the Spiral Bevel Gear

“…The machining time of each gear teeth was determines based on the time machining from the control system of five-axis CNC machine. And then, the productivity was calculated by (1).…”

“…In application of machines such as for thermal power generation system, marine propulsion elements, mines and quarries, wind's kinetic energy system, automation, etc. the spiral bevel gears are the most important components of power transmission system [1,2] In the manufacturing of spiral bevel gears, many different methods were applied to cut the gear teeth of spiral bevel gears. In which, most of the machining of spiral bevel gears were conducted by the specialized machines.…”

A novel engagement-pixel image edge tracking method for extracting gear tooth profile edge

“…For instance, beveloid gears, non-circular gears, compressor screw rotors, and etc. 1–3 As such, it is of vital importance to design the tooth profile in more precision and more efficient ways.…”

Five-Axis Milling of Large Spiral Bevel Gears: Toolpath Definition, Finishing, and Shape Errors

“…The large-sized spiral bevel gears represent one of the most important components of power transmission units in big machines, for mines and quarries, thermal power generation systems, marine propulsion elements, wind's kinetic energy applications, and so on [1,2]. Owing to the fact that there is presently an increase of energy requirements on the earth, the demand for large-sized spiral bevel gears has risen accordingly, and future technology predictions have singled out that it may continue to do so for some time.…”